Preheat the oven to 350F.,Butter and flour two 8-inch round cake pans; set aside.,In a food processor, combine the nuts, flours, sugar, and salt; pulse until the nuts are finely ground but not oily.,Add the butter, oil, lemon zest, and lemon juice; pulse until the mixture just comes together.,Divide the mixture between the pans and press in until even.,With a sharp knife, cut each round of dough into 8 wedges.,Lightly prick the tops with the tines of a fork.,Bake until set and pale tan, about 22 minutes.,______,Cool 10 minutes, then invert onto a plate and transfer to a wire rack to cool completely.